<template>
  <view>
    <view class="cart-container" v-if="cartStore.cart.length !== 0">
      <my-address></my-address>
      <!-- 购物车商品列表的标题区域 -->
      <view class="cart-title">
        <!-- 左侧的图标 -->
        <uni-icons type="shop" size="18"></uni-icons>
        <!-- 描述文本 -->
        <text class="cart-title-text">购物车</text>
      </view>
      <!-- 商品列表区域 -->
      <!-- uni-swipe-action 是最外层包裹性质的容器 -->
      <uni-swipe-action>
        <block v-for="(goods, i) in cartStore.cart" :key="i">
          <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
          <uni-swipe-action-item :show="status" :right-options="options" @click="swipeActionClickHandler(goods)">
            <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler"
              @num-change="numberChangeHandler"></my-goods>
          </uni-swipe-action-item>
        </block>
      </uni-swipe-action>
      <!-- 结算区域 -->
      <my-settle></my-settle>
    </view>
    <!-- 空白购物车区域 -->
    <view class="empty-cart" v-else>
      <image src="/static/cart_empty@2x.png" class="empty-img"></image>
      <text class="tip-text">空空如也~</text>
    </view>
  </view>
</template>

<script setup>
  import useRenderBage from '@/hooks/useRenderBadge.js'
  import {
    useCartStore
  } from '@/store/cart.js'
  import {
    ref
  } from 'vue'
  const {
    setBadge
  } = useRenderBage()
  const cartStore = useCartStore()
  let status = ref('none')
  const options = [{
    text: '删除', // 显示的文本内容
    style: {
      backgroundColor: '#C00000' // 按钮的背景颜色
    }
  }]
  // 商品的勾选状态发生了变化
  const radioChangeHandler = (e) => {
    cartStore.updateGoodsState(e) // 输出得到的数据 -> {goods_id: 395, goods_state: false}
  }
  // 商品的数量发生了变化
  const numberChangeHandler = (e) => {
    cartStore.updateGoodsCount(e)

  }
  // 点击了滑动操作按钮
  const swipeActionClickHandler = (goods) => {
    cartStore.removeGoodsById(goods.goods_id)
    setBadge()
  }
</script>

<style lang="scss">
  .cart-container {
    padding-bottom: 50px;
  }

  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;

    .empty-img {
      width: 90px;
      height: 90px;
    }

    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }

  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 10px;
    }
  }
</style>
